Guiding attachment for carpenters&#39; planes



Jan. 15, 1929.

C. E. JOHANSSQ-N GUIDING ATTACHMENT FOR CARPENTERS PLANES Filed Feb. 4, 1928 I u I I I l l I I I I I I u I Patented Jan. 1 5, 1929 CARL E. JOHANSSON,

GUIDING ATTACHMENT FOR CARPENTERS 01? SOUTH MANCHESTER/CONNECTICUT.

PLANES.

Application filed Februarye, 1928. Serial No. 251,838.

This invention relates to woodworking planes'of the type used by carpenters and others, and more particularly to an attachment therefor for ensuring true edges of strips and boards being planed.

The object of the invention is to provide a very simple straight edge or guiding attachment for theordinary woodworking plane which guide is inexpensive to produce and which can be readily applied to or removed from the plane by anyone, whereby the plane may be used in its normal condition, or the guide quickly attached in such position as to insure accurate right angle cuts, or chamfering cuts, according to which end forward the guide is-fastened to the plane.

This object'is attained by making holes through the side or bottom of the stock of the plane, and providing a guide or straight edge that is angular in cross section and is adapted to be fastened to the side or bottom of the plane stock by means that will enter the perforations so that it tudinally of the plane stock, which perforations and fastening means are so located and related that the guide may be attached to the plane stock either end forward. When the guide is fastened one end forward and with a face perpendicular to the bottom of the plane stock the plane blade cuts at exactly right angles to the side surface of the piece being planed, and when the guide is turned end for end and fastened with the other end forward the cuts will bevel or chamfer the edge being planed.

In the accon'ipanying drawings 1 illustrates a side elevation of a common type of jack plane with a guide detachably fastened thereto. Fig. 2 shows a transverse section of the stock, on the plane indicated by the dotted line 2-2 on Fig. 1, as it would appear when the plane is to be used normally and without the rude. Fig. 3 is a similar sect-ion with the guide applied to the side of the plane so as to insure the desired chamfer or angular 'cut on the edge of a strip or board. Fig. 4 is a similar section with the guide applied to the side of the plane so as to ensure accurate planing of the edge of a strip or board at right angles to the side surface. Fig. 5 is a perspective view of one form of guide. Fig. 6 is a transverse section of the plane stock with a modified will extend longi form of guide attachedto the bottom so as to ensure a right angular cut.- Fig. 7 is a similar view with the guide arranged to ensure the desired chamfer.

-The plane may be any well known type and size, that illustrated having a metal stock 1 with push handle 2, guide handle 3, and cutting blade 4 fastened between the bed plate 5 and the break plate 6 by the clamp 7. 1 For the purpose of this invention perforations 8 are made through the side of the stock of the plane, or perforations 9 are made through the bottom or sole of the stock equal distances from the ends, which perforations may or may not be threaded, as desired.

The straight edge or guiding attachmentmade of a strip of sheet 10 is preferably metal,and it is triangular in cross section and desirably approximately the same length as the plane stock. 1 The guide first shown has a-wall 11 and awall 12 extending at forty-five degrees from the edge thereof, the wall 11 being slightly offset. Perforations 13 are made in the wall 11 near its upper edge and these perforations are spaced apart the same distance as the perforations 8 in the side of the stock so that they will register therewith. Thumb screws 14 are turned through the perforations in the guide and into the perforations in the plane stock for fastening the guide in place against the side of the plane.

If itis desired to plane a true right angular edge on a board or strip the guide is attached to the plane with the inclined wall 12 on the outside, as indicated in Fig. 4, in which position the inside wall 11 of the guidewill slide against the side surface of the piece being planed and hold the plane so that it will cut at exactly right angles to the side surface. For the purpose of cutting a chamfer the fastening means are un screwed and the guide removed and turned end for end and fastened so that the inclined wall 12 will be on the inside, as indicated in Fig. 3, and then the plane will be guided in such position that the edge of the piece being planed will be cut on the angle to its side surface which the inclined wall of the guide has to the bottom surface of the sole of the plane. I

The guide may be made in the shape of a hollow triangle if desired, as illustrated in being a jack plane Figs. 6 and 7 This form differs from the one previously mentioned in that instead of having the vertical wall extended and per for-ated so as to be attached to the side of the plane, either the vertical wall or the inclined wall 16 may be folded over so as to form a top wall 17. This top wall is provided with threaded perforations for the reception of thumb screws 19. For this form perforations 9 are made through the bottom or sole of the plane stock for the passage of the thumb screws 19 which are used to attach the guide to the under side of the sole. With this modified form the guide may be fastened to the plane with either end forward, depending upon whether a right angular cut of the plane is desired, in Wl'llCh case the guide is attached as shown in Fig. 6, or a chamfer cutis to be made, in which case the guide is attached as illus trated in Fig. 7.

The guiding attachment described is very simple to make and very easily applied for ensuring either a right angular cut or a chamfer cut, and when its use is not desired it may be quickly removed and leave the plane in normal condition for common use. Not only is the guide illustrated suitable for ensuring right angular or chamfering cuts, but it may be when removed used as a straight edge or for marking angles on a piece of wood. Furthermore, one wall may be graduated in inches and fractions thereof to enable the guide to be used as a ruler or measure.

The invention claimed is:

1. An angular guide that is adapted to be attached to a carpenters plane either end forward, said guide having a wall that will extend perpendicular to the bottom of the plane when one end is forward and a wall that will extend oblique to the bottom of the plane when the other end is forward, and means adapted to fasten a wall of the guide to a wall of the plane.

2. An angular guiding attachment for carpenters planes, that has two integral guiding, walls oblique with relation to each other, one of said walls being adapted to fit and to be attached to the side wall of the plane and to extend below and at right angles to the bottom of the plane, and means for detachably fastening said attachment wall to the side of the plane either side inward.

3. An angular guiding attachment for carpenters planes, that has two integral guiding walls, one of which is oblique with relation to the other, one of said walls being perforated and adapted to fit the side wall and to extend at right angles to the bottom of the plane, and means adapted to pass through said perforations for detachably V, fastening the attachment to the side of the plane either end forward.

CARL E. J OHANSSON. 

